This indicates a buffer overflow vulnerability in Microsoft Remote Procedure Call (RPC) interface.
RPC is an inter-process communication mechanism used by Windows that allows a program running on one computer to execute code on a remote system. Due to inadequate user input validation, a remote attacker can execute arbitrary code on the target system by sending it a specially-crafted message.
Microsoft Windows NT 4.0
Microsoft Windows 2000
Microsoft Windows XP
Microsoft Windows Server 2003
An attacker can execute arbitrary code on a target system
Apply appropriate patches or upgrade the system to the latest non-vulnerable version.